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Application

Radmat DM12 is a drainage element for use beneath bedded paving or a cast concrete slab installed above waterproofing or ProTherm Min-K layer in inverted roofing.

Description

A drainage board with integral filter layer for extensive green roofing.


Features and benefits:

  • Consisting of a non-woven needle punched geotextile filter layer thermally bonded to one side of a 12 mm-deep HDPE (high-density polyethylene) cuspated core DM12 is effectively impermeable one side.
  • The textile filter has a flap extending beyond the core on one edge.
  • Installation instructions: Unroll over waterproofing membrane or protection fleece butting side laps and end laps.
  • Delivery form: Sheet.
  • Storage and transport: Delivered flat on a pallet. Store flat.

General information

Color

Black

Finish

Unfinished

Material

Polyethylene

High density polyethylene (HDPE)

Shape

Other

Length

50000 mm

25000 mm

Width

1100 mm

2200 mm

Height

12 mm

Warranty description

40 year

Uniclass

Pr_25_57_51_68 Polypropylene (PP) studded sheetsPrimary

CAWS

Q37/355 Combined layers

Q37/350 Drainage layer

Q37/340 Moisture retention mat

Q37/360 Filter membrane

J40/290 High-density polyethylene/ polypropylene studded cavity drain membrane

J40/47 High-density polyethylene/ polypropylene studded cavity drain membrane

Specification data - Polypropylene (PP) studded sheets

Standard

To BS EN ISO 9863-1, BS EN ISO 10319, BS EN ISO 12956, BS EN ISO 12236, BS EN ISO 13433, ASTM D1603, BS EN ISO 9864, ASTM D7361-07, BS EN ISO 11058 and BS EN ISO 12958.

Filter layer

Non-woven needle punched geotextile.

Stud height

Manufacturer's standard.

Guidance for specification option:

Studded layer: High-density polyethylene (HDPE).

Sheet thickness

12 mm.

Guidance for specification option:

-10%.

Manufacturer guidance

 at 2 kPa

Weight (minimum)

970 g/m².

Guidance for specification option:

Approximate, to BS EN ISO 9864.

Colour

Black.

Performance characteristics

-

Flow rate

95 l/m²/s, 2.5 x 10⁻³ m/s.

Guidance for specification option:

±30%.

Manufacturer guidance

At 50 mm head At 2 kPa permeability (coeff) to BS EN ISO 11058

Recycled content

50%.

Length

50 000 mm.

25 000 mm.

Width

1100 mm.

2200 mm.

Tensile strength MD/CD

9.5/9.5 kN/m.

Guidance for specification option:

-15%.

Manufacturer guidance

BS EN ISO 10319

Elongation

50/50%.

Guidance for specification option:

±30%.

Manufacturer guidance

BS EN ISO 10319

Aperture size

115 µm.

Guidance for specification option:

±30%.

Manufacturer guidance

Pore size 0₉₀ (to BS EN ISO 12956)

CBR puncture resistance

1600 N.

Guidance for specification option:

To BS EN ISO 12236, -15%.

Performance

32 mm.

Guidance for specification option:

+25%.

Manufacturer guidance

Dynamic cone drop to BS EN ISO 13433

Carbon black content (to ASTM D 1603)

0.8–2.5%.

Tensile strength MD/CD

9.5/9.5 kN/m.

Guidance for specification option:

-15%.

Manufacturer guidance

BS EN ISO 10319

Compressive strength (minimum)

700 kPa.

Manufacturer guidance

(Ultimate) to BS EN ISO 10319

Compressive strength - Permanent

250 kPa.

Manufacturer guidance

/ Long term loading strength (100+ years) to BS EN ISO 10319

Strength

200 kPa.

Guidance for specification option:

Long-term loading strength (100+ years) to ASTM D7361-07.

Elongation MD/CD

45/30%.

Guidance for specification option:

To BS EN ISO 10319, ±10%.

CBR puncture resistance

1600 N.

Guidance for specification option:

To BS EN ISO 12236, -15%.

Water flow (in plane)

1.0/0.1.

Guidance for specification option:

MD/CD:

HG = 1.0:

  • At 20 kPa pressure = 4.25 L/ms (±0.25).
  • At 100 kPa pressure = 3.50 L/ms (±0.25).
  • At 200 kPa pressure = 2.50 L/ms (±0.25).

HG = 0.1:

  • At 20 kPa pressure = 1.25 L/ms (±0.12).
  • At 100 kPa pressure = 1.00 L/ms (±0.12).
  • At 200 kPa pressure = 0.65 L/ms (±0.12).


NOTES

  • The geotextile is bonded to the core to minimise intrusion into and blockage of the drainage passage under the action of pressure of backfill material.
  • The values given are indicative and correspond to nominal results obtained in our laboratories and testing institutes. In line with our policy of continuous improvement the right is reserved to make changes without notice at any time.
  • Unless otherwise stated allowable tolerances are ± 10% of the typical value. The tolerance on roll length is 1.5% and on roll width 1.0%.
  • Due to the range of products, interfaces with other products and loading conditions, only selected testing has been done on creep and protection efficiency. Radmat will be pleased to discuss available test data and arrange testing if appropriate.
  • Final determination of the suitability of any information is the sole responsibility of the user. Radmat will be pleased to discuss the use of this or any other product but responsibility for selection of a material and its application in any specific project remains with the user.

Manufacturer guidance

(Hydraulic gradient) MD/CD (to BS EN ISO 12958):

Sustainability data

Contains Red List materials

No

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

Recyclability

100%

Recycled content

As defined in clause 7.8 of BS EN ISO 14021

50 %

Literature

MedO DM12 Drainage Board Product Data Sheet

MedO DM12 Drainage Board Product Data Sheet

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